"Not only is this an exciting announcement for us and the adult entertainment industry, it's exciting for the crypto space. History has proven that the adult entertainment industry plays a critical role in adoption for innovative technology. We saw that with VHS, Beta Max, credit card payment icons and, most recently, VR goggles. We expect to see widespread adoption of crypto and blockchain in short order."
My opinion is that it's not exactly mainstream, but it's a start! :)
Read the full story here...
https://www.coindesk.com/pornhub-adds-crypto-payment-option-verge-token/